Smoke-consuming device for furnaces.



No. 655,22l. Patented Aug. 7, |900.

a. s. GALLAGHER. SMOKE 00N NG D E FOR FURNAGES ication le c 25, 1899.) (No Model.) 2 Sheets--Sheet I.

W97; ,g M, 7 5

No. 655,22l. Patented Aug. 7, |900.

s. s. GALLAGHER.

SMOKE `CNSUMINl DEVICE FOR FURNACES.

(Application led Oct. 25, 1899.)

(un Model') 2 Sheets-Sheet 2 4 QQ QD QQ @D Wil/'77,65 S n-UgnZ-OT the side walls g g' and across through the UNITED 'STATES'. 'PATENT omer.

`GEORGE S. GALLAGI-IER, OF NEW YORK, N. Y., ASSIGNOR TO ZILLIAII B. GALLAGHER, EMMA G. GALLAGHER, AND HARRY F. GALLAGHER, OF

sAME PLACE.

SMOKE-CONSUMING DEVICE FOR FURNACES.

SPECIFICATION forming part ornett'efs Patent No. 655,221, datednugust 7, 1900.

Application iiled October. 25, 1899.

To all whom, it may concern:

Beit known that I, GEORGE S. GALLAGHER, a citizen of the United States, residing4 at New York city, in the county and State of New York, have invented an Improvement in Smoke-Consuming Devices for Furnaces, of which the following is a specification.

rThis invention relates to devices for consuming smoke in furnaces, the `object being to prevent the same leaving the fire-chamber and to effect the consumption of the same before the products of combustion pass'over the bridge-wall of the furnace and to the chimney. In carrying out my invention I effect this condition by drawing the smoke oif the re through flues and injecting the same commingled with air in currents of force above the re, where the commingled smoke and air are fully consumed because of the presence of abundance of air. The smoke is consumed in the upper portion of the fire-chamber before the products of combustion pass over the bridge-wall, and the effective heatunits are thus greatly increased. In order to accomplish this result, I construct the bridge-wall of the furnace with especially-arranged flues for the smoke and for air, all of which are hereinafter more particularly described, it being borne in mind that the air-currents of force or the draft are produced through the arrangement of flues by the action of a tall chimney.

In the drawings, Figure 1 is a partial 1ongitudinal section and elevation; and Fig. 2, a cross-section at @c a: of Fig. 1, representing my improvements. Fig. 3 is a partial longitudinal section upon the line y y of Fig. 2, and Fig. 4 is a partial longitudinal elevation and section representing a modification.

The boiler c, the metal front b, the combustion-chamber c, the grate-bar d, the ashpit e, the foundation f, and the side supporting-walls g g', as well as the smoke-pipe h, are of usual construction in furnaces and do not require further description.

The bridge-wall t occupies about the usual position, and I provide entrance-fines 2 3 for air from opposite sides of the furnace through sei-iai No. 734,696. dro model.)

bridge-wall t', there being, preferably, a central division closing one iue from the other.

`Connected tothese tlues 2 3 are branch iiues 4the fuel.

In the bridge-wall t' there are a series of double air-return flues 7 8, placed horizontal and spaced apart with end connections between the horizontal portions of said flues. I provide air-flues 9, parallel with the upper portions or members 7 of the double iiues, the rear ends of which open into the flues 2 3 and the forward ends of which fiues join with the forward ends of the flues 7, there being between the flues 7 and 9 a narrow division running toward the front of the bridge-wall and terminating a short distance before reaching the front, as will be seen by the section Fig. 3. The construction and operation of this part are similar to an injector.

The chimney employed for creating a draft in afurnace in the usual 'manner draws the air in currents of force into the fines 2 3, through the iiues 9,and out into the combustion-chamber c. A suction action is thus produced, which draws the smoke from over the hre beneath the discharge-level of the air into the iiues 8 and through the rear connection therefrom into the flues 7 and the smoke commingled with the air at the exit-opening of the ues 7 and 9 is forced out into the cornbustion-chamber c, where, in the presence of an abundant supply of air, the smoke is consumed under the boiler abovethe reinthe combustion-chamber and the eective heat units are increased, so that the products of combustion that pass over theV bridge-wall and through the lines of the boiler and away by the chimney in the usual manner are clear gaseous products of combustion free of smoke. Fig. 2 shows by the arrows the air passing from the flues 2 3 along and down the branch iiues 5 6 and out into the ash-pit c beneath the grate-bars. It will thus be seen that air is provided not only for the combustion of the fuel, but for drawing the smoke 0E the surface of the fire, commi-ngling it with air and" burning the same above the Iire.

In the modification, Fig. 4, I have shown a hollow arch k, extending across between the side walls g g' through the combustion-chamber, the under surface of which arch is perforated with air-openings 10. lThe hollow arch is connected with air-openings through the side walls for the additional supply of air, the object being to provide an abundant supply of air to kinsure perfect combustion beneath the boiler.

I claim as my invention;-

1. The combination in a furnace with the grate-bars and a bridge-wall, of flues for the draft or currents of air under force, extending longitudinally through the bridge-Wall,l

and short lines transversely inthe bridgewall, and connecting therewith, ,and `acting to draw the smoke E the surface of the fire and commingle the same with the said currents of air, Aand eject the same into the comb-ustion-ohamber over the ,fireto be consu med,

substantially in the manner and for the purposes set forth.

2. vThe combination -in a furnace with the grate-bar and the bridge-wall, of entrancei flues for the draft or currents of air under force, a series of double or return flues connected and placed horizontally in said bridgewall, Iiues for the draft acting in conjunction with the said series of ,return-.lines as eje,c. tors, whereby the smoke is drawn olf the fire g through the said series of double iiues andl comming'led with the currentsof air is forced .j over the fire into the combustion-chamber to be consumed, substantially in the manner 1 and for the purposes set forth.

3. In a furnace, the combination with `the grate-bar and thebridge-Wall, of entranceues 2 3 from opposite sides through the said bridgewall, a series of parallel double or return flues 7 8 connected at their inner ends, air-flues 9 parallel with the flues 7 and connecting4 at e one end with the entrance-dues 2 3 and at'the f other end forming a `common exit-opening with the iues 7, substantially as and for the purposes set forth.

4. In ajfurnace, the combination with the igrate-bar and the bridge-wall, of entrancefines 2 3 from opposite sides through the said bridge-wall, a series of parallel double or return flues 7 8 connected at their inner ends,

l air-hues 9 parallel with the iues 7 and connec-tingat one end with the entrance-lines 2 3 and at the other end forming a common exit- -opening with the iues 7, and the branch lues 5 6 through the side walls of the furnace and Opening beneath the grate-bars, substantially as and for .the purposes set forth. y

5. In a furnace, the combination with the grate-bar and the bridgefwall, of'entrance- `iiues 2 3 from opposite sides through the said bridge-wall, a series of parallel double or return flues 7 8 connected at their inner ends,

air-lines 9 parallel with the flues 7 and connecting at one end with the entrance-nues 2 3 and at the other end forminga common exit- Kopening with-the flues 7, and a hollow arch k vhaving air-openings 10 extending across .the lcombustio-n-cl'iarnber forward .of the bridge-A wall,r substantially as set forth. v

VSigned by me this thday of October, 1899. cnoReE s. GALLAGHER. Witnesses:

GEO. T. ,PINQKNEYQ E. E. POHL. 

